Efficient removal of Pb<sup>2+</sup> by Tb-MOFs: identifying the adsorption mechanism through experimental and theoretical investigations

Zhu, Hongshan; Yuan, Jie; Tan, Xiaoli; Zhang, Wenhua; Fang, Ming; Wang, Xiangke

doi:10.1039/c8en01066h

Cited by 118 publications

(54 citation statements)

References 53 publications

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“…As shown in Table , both sawdust and different sawdust/LDHs composites were employed to adsorb Pb(II). Since LDHs only grew on the sawdust surface, the adsorption capacity of the sawdust/LDHs composites was still lower than other chemical adsorbents, such as metal‐organic frameworks and graphitic carbon nitride . However, the preparation of sawdust/LDHs composites is convenient, low‐cost and environment‐friendly.…”

Section: Resultsmentioning

confidence: 99%

In Situ Growth of Layered Double Hydroxides on Sawdust for Pb(II) Adsorption

Gong

Tan

et al. 2019

ChemistrySelect

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In this paper, waste wood (sawdust) was modified with layered double hydroxides (LDHs) to improve its adsorption capacity for Pb(II). The LDHs grew easily and evenly on the sawdust in situ through a hydrothermal method. Then, the functional groups and favorable crystal structures of sawdust/LDHs composites were demonstrated by FTIR and XRD. The results showed that the adsorption capacity of sawdust/LDHs composites for Pb(II) increased by 83.61% compared to sawdust, and the optimum conditions for adsorption were at pH 6 for 180 min with an adsorbent dosage of 3 g/L. Moreover, the behavior of Pb(II) adsorption preferably followed pseudo‐second‐order, Langmuir and Freundlich models, with all the R2 values exceeding 0.97. It was indicated that Pb(II) adsorption occurred on the monolayer and heterogeneous surfaces through chemical bonding and electrostatic interaction. Due to their low cost and high adsorption capacity, the plant‐based composites have great potential in the treatment of lead‐containing wastewater.

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Section: Resultsmentioning

confidence: 99%

In Situ Growth of Layered Double Hydroxides on Sawdust for Pb(II) Adsorption

Gong

Tan

et al. 2019

ChemistrySelect

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“…Another approach to removing Pb II pollutants relies on exploiting the excellent properties of Ln–MOFs . Thus H 3 TATAB and Tb III were chosen to create nanotube‐like MOFs via solvothermal reactions.…”

Section: Adsorption Of One Metal Ionmentioning

confidence: 99%

Recent Progress in the Removal of Heavy Metal Ions from Water Using Metal‐Organic Frameworks

2020

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The efficient adsorption of heavy metal ions from wastewater has become a serious challenge from both environmental and biological viewpoints. Recently, porous metal‐organic frameworks (MOFs), with metallic clusters and organic linkers, have been developed as promising structures in the capture of different toxic and hazardous substances, including heavy metal ions, because of their unique features. Here there is a collection for recent progress in the field of water remediation from the variable‐valent metals in polluted water and the corresponding MOFs which are able to remove these pollutant agents from water. Meanwhile, effective factors in the absorption of metal ions are discussed. MOFs are considered to be a promising candidate for metal ions removal from wastewater.

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“…where T is the absolute temperature (K), R is the universal gas constant (8.314 × 10 −3 kJ mol −1 K −1 ), and (k c , L/g) is thermodynamic distribution coefficient for the adsorption calculated from the following equation [26,27] :…”

Section: Thermodynamic Analysismentioning

confidence: 99%

Modification of Langmuir model for simulating initial pH and temperature effects on sorption process

Naji

Jassam

Yaseen

et al. 2019

Separation Science and Technology

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The present study modifies the sorption isotherm for simulating the influences of initial pH and temperature variations on the cadmium sorption from contaminated water using waste foundry sand based on Langmuir, Freundlich, and Temkin models. Results proved that the Langmuir expression is able to adopt these effects by relating sorption capacity and affinity constants with pH and temperature of aqueous solution through exponential relationships (determination coefficient = 0.9375). The present model is assumed that the sorption process occurs through acidic functional groups and this is consistent with FTIR outputs. Interaction of cadmium/WFS is found to be exothermic by thermodynamic analysis.

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Efficient removal of Pb²⁺ by Tb-MOFs: identifying the adsorption mechanism through experimental and theoretical investigations

Abstract: Porous Tb-MOFs with abundant nitrogenous functional groups show efficient Pb2+ removal.

Cited by 118 publications

References 53 publications

In Situ Growth of Layered Double Hydroxides on Sawdust for Pb(II) Adsorption

In Situ Growth of Layered Double Hydroxides on Sawdust for Pb(II) Adsorption

Recent Progress in the Removal of Heavy Metal Ions from Water Using Metal‐Organic Frameworks

Modification of Langmuir model for simulating initial pH and temperature effects on sorption process

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Efficient removal of Pb2+ by Tb-MOFs: identifying the adsorption mechanism through experimental and theoretical investigations

Abstract: Porous Tb-MOFs with abundant nitrogenous functional groups show efficient Pb2+ removal.

Cited by 118 publications

References 53 publications

In Situ Growth of Layered Double Hydroxides on Sawdust for Pb(II) Adsorption

In Situ Growth of Layered Double Hydroxides on Sawdust for Pb(II) Adsorption

Recent Progress in the Removal of Heavy Metal Ions from Water Using Metal‐Organic Frameworks

Modification of Langmuir model for simulating initial pH and temperature effects on sorption process

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Product

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Efficient removal of Pb²⁺ by Tb-MOFs: identifying the adsorption mechanism through experimental and theoretical investigations